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Finding the Fourth Proportional to 8,782.98, 12,119.40 and 5,245.50

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Solution

The fourth proportional to 8,782.98, 12,119.40 and 5,245.50 is: 7,238.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.98 : 12,119.40 = 5,245.50 : x
  2. Step 2: Convert to fraction form
    8,782.98/12,119.40 = 5,245.50/x
  3. Step 3: Cross multiply
    8,782.98x = 12,119.40 × 5,245.50
  4. Step 4: Simplify right side
    8,782.98x = 63,572,312.70
  5. Step 5: Solve for x
    x = 63,572,312.70/8,782.98
  6. Step 6: Final answer
    x = 7,238.13

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.